FRONTLINE: THE AL QAEDA FILES is a compilation of seven highly acclaimed programs — produced in the years following 9/11 — focusing on the inner workings of Al Qaeda and their ongoing conflicts with the United States.

In August 1998, two cars exploded simultaneously at U.S. embassies in Kenya and Tanzania, killing 268 and injuring 5,000. CIA and FBI investigators soon identified suspects, including accused mastermind and Saudi exile Osama bin Laden. But was this an individual terrorist act, or a symptom of deeply rooted anti-U.S. vendettas?

Attacks on the World Trade Center and Pentagon were history's most devastating terrorist assault and the worst failure of U.S. intelligence in 60 years. Examine how the seeds of anti-American hatred were sown and investigate CIA and FBI failures to uncover the hijackers' plot

FBI Special Agent John O'Neill was the bureau's top counter-terrorism agent, but his warnings about Al Qaeda were muted by headquarters. Trace the story of O'Neill's life and career, getting a rare glimpse into what the government knew about Al Oaeda.

Three months after 9/11, the War on Terror had crushed the Taliban, but members of Osama bin Laden's terrorist network had escaped to Pakistan. Examine the quest to bring them to justice, as FRONTLINE follows Al Qaeda's trail from Afghanistan to Pakistan's cities, and U.S. and Pakistani authorities track down its leaders.

What was the real story behind a group U.S. intelligence called America's "most dangerous terrorist cell"? Take an in-depth examination of a major domestic terrorism case involving Al Qaeda operatives and U.S. citizens they trained, raising questions about FBI and CIA effectiveness, Can their new tools contain domestic threats?

Growing up in the 1990s, Abdurahman Khadrs playmates were the children of his fathers longtime friend, Osama bin Laden. Khadr was raised to be an Al Qaeda terrorist, but he ultimately found himself working for the U.S. Through interviews with Khadr as well as his mother and siblings, the documentary recounts his incredible journey.

A filmmaker is murdered in a culture clash between Muslims and Christians in the Netherlands. A series of bombs tear apart four trains in Madrid. Al Oaeda terrorist cells are uncovered in the U.K., Germany, Italy, and Spain. FRONTLINE investigates the new front in the war on terror: Europe.